Furnace.



No. 713,749. Patented Nov. I8. I902.

' S. A. CHENEY.

FURNACE.

(Application filed Apr. 21, 19024) (No Model.) 2 Sheais8haet I.

flttorney.

Patented N'ov. l8, I902. S. A. CHENEY.

F U B N A C E (Application filed Apt. 2 1, 1902.)

(No Model.)

2 Sheets-Sheet 2.

Wit disses:

llnrrnn Starts Arnnr Prion.

SAMUEL A. CHENEY, OF NEVVBURYPORT, MASSACHUSETTS.

FURNACE.

SPECIFICATION forming part of Letters Eatent No. 713,749, dated November 18, 1902.

Application filed April 21, 1902. Serial No- 103,913. (N modem To atZZ whom, it may concern:

Be it known that I, SAMUEL A. CHENEY, a citizen of the United States, residing at Newburyport, in the county of Essex and State of Massachusetts,have invented certain new and useful Improvements in Furnaces; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the figures of reference marked thereon, which form a part of this specification.

My invention relates to furnaces of that class in which hot water as well as hot air is generated therefrom to supply water-radiators and hot-air registers in dilferent parts of the building; and its object'is to provide an improved simple construction of this type of furnace wherein the heating capacity of the hot-air chambers and the water-reservoir is increased and to combine and aggroup the parts in a novel manner.

For a full understanding of the merits and advantages of my invention reference is to be had to the following description and accompanying drawings, in which- Figure 1 is a front elevation of the furnace. Fig. 2 is a longitudinal vertical section on the line a: w of Fig. 1. Fig. 3 is a transverse section on the line y 'y of Fig. 2. Fig. 4 is a perspective of one of the plates inolosing the combustion-chamber.

Like characters of reference indicate corresponding parts throughout the several views.

In the drawings, 1 designates the ash-pit inclosed by the annular wall 2, mounted eccentrically in the base of the furnace and supporting the plate The plate 3 is provided with an opening in which the grate 4 is mounted and supports the vertical wall 5 of the firepot 6. This vertical wall is centrally arranged within the furnace to provide an annular space 7 between it and the outer casing 8 for the circulation of the cold air to the hotair flues above.

9 indicates the co mbustion-chau1ber,having the fire-pot and allows the products of coinbustion to escape behind the same into the annular chamber 12, surrounding the comhustion-chamber.

Supported by the wall 5 of the fire'pot and an internal rib 13 on the casing is a plate 14, (shown in Fig. 4,) having semicircular openings 15 formed near its outer edge, and near the top of the'furnace is mounted another similar plate 16, supported on a second internal rib 17 and provided with corresponding semicircularopenings. Theedgeofthemetal is bent up around these openings and provide upstanding flanges, over which the flues are fitted. The two plates 14 and 16 form the upper and. lower walls of the combustion-chamber and prevent the escape of hot air into the same.

Mounted in the combustion-chamber are vertical hotair flues 18, semicircular in cross-section. The outer faces of the hotair fines conform to the shape of and fit snugly against the vertical walls 10, so that both their inner and outer surfaces are exposed to the action of the products, for the products not only circulate in the combustion-chamber 9, but pass into the chamber 12 through the front opening 11 Asmoke-flue 2O communicates through the inner vertical wall 10 into the combustionchamber, and a second smoke-flue 21 communicates with the exterior or inolosing wall of the furnace with the exterior or outer chamber 12. \Vhen the fire is first built, the damper in the smoke-flue 20 is open to allow the direct course of the products therethrough, but after the fire has burned sufficiently to generate heat the damper in the smoke-flue 20 is closed, while the one in flue 21 is opened. 7 The products will now be compelled to take a circuitous passage around the inner walls of the hot-air fines through the openings 11 and into the chamber 12, making their exit through the flue 21 and at the same time heating all the surfaces of the hotair lines. The cold air enters through a pipe 22 into the chamber 7 through the lines 18, where it becomes heated, and thence into a chamber 23, above the plate 16, where it is carried off through pipes 24 to different parts of the building.

Inconnection with the hot-air furnace l employ a water-heating system which con sists of a cross-shaped reservoir 25, suspended from the center of the plate 16 and depending into the combustion-chamber 9, which position permits of direct action from the products. Through each wing of the cross extends a series of horizontal openings 26, which strengthen the wings and increase the heating-surfaces of the reservoir. The water is admitted through a supply pipe 27 and discharged at the top through a pipe 28, from which it is carried to water-radiators in different parts of the building. By this construction and arrangement of parts the heating-surfaces of both the hot-air flues and the waterreservoir are greatly increased and heated to a uniform temperature.

In the front of the casing 8 is fitted a flat panel 29, to which is hinged the door 30, through which the fuel may be introduced, and beneath the door 30 is a door 31 for the ash-pit, having suitable draft-openings 32.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, is"

1. A furnace having a combustion-chamber, an outer annular chamber surrounding the combustion-chamber and communicating therewith, semicircular hot-air flues disposed within the combustion-chamber, and in contact with the inner wall of the outer annular chamber, a passage to admit the cold air to said hot-air flues, and smoke-flues communicating with the combustion-chamber and outer annular chamber.

2. In a furnace, the combination with a firepot and a combustion-chamber, of semicircular vertically-disposed hot-air flues arranged in the combustion-chamber, an outer annular communicating chamber surrounding the combustion-chamber through which the products pass to act upon the outer surface of the hot-air flues, a water-reservoir disposed centrally within the combustion-chamber, means for conducting the water thereto, and means for conducting the cold air to the hot-air flues, substantially as specified.

3. In acombinedhot-water and hot-airheating apparatus, the combination of the crossshaped reservoir centrally disposed within the furnace and having openings extending therethrough, a series of semicircular hot-air flues disposed within the combustion-chamber of the furnace, an annular outer chamber surrounding the same, means for causing the products of combustion to take a circuitous passage through said annular chamber, means for conveying cold air to the hot-air flues, and means to conduct the water to the reservoir.

4.. In a hot-air furnace, the combination of an eccentrically-arranged ash-pit, a fire-pot above said ash-pit, an air-chamber surrounding the fire-pot and ash-pit, a combustion chamber, the top and bottom walls of which are formed of circular plates having semicircular openings near their outer edges, hot-air flues fitted around said openings and against the side walls of the combustion-chamber, an annular chamber surrounding the combustion-chamber and hot-air flues, means whereby the products are caused to, act directly upon both the inner and outer surfaces of the said flues, a Water-reservoir depending from the top wall of the combustion-chamber and a hot-air chamber at the top of the furnace, substantially as set forth.

5. In a furnace, the combination of a combustion-chamber, the top and bottom walls of which are formed from circular plates having semicircular openings formed therein, and provided with internally-turned flanges, a series of semicircular hot-air flues connecting the two plates and fitted over said flanges, an annular chamber surrounding the combustion-chamber and hot-air flues and communicating with said combustion-chamber, whereby the products act upon all surfaces of the said flues, a hot-air chamber in the top of the furnace and a removable water-reservoir depending within the com bustion-chamber, and having a series of openings projecting therethrough, substantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

SAMUEL A. CHENEY.

Witnesses:

THOMAS HUMPHREYS, MARY ETTA CHENEY. 

